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lab 2

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Total cards: 19•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (19)

#1
Front (Question)

how to know if sample representative of population

Back (Answer)

unbiased and adequate in size

#2
Front (Question)

random sampling

Back (Answer)

sampling randomly using random number generators etc

#3
Front (Question)

systemic sampling

Back (Answer)

taking samples that have regular arrangement

#4
Front (Question)

advantages to systemic sampling

Back (Answer)

easyer

#5
Front (Question)

combination sampling

Back (Answer)

combination of systemic and random sampling

#6
Front (Question)

which sampling method is recommended

Back (Answer)

random sampling- stat tests based off this

#7
Front (Question)

is it better to take more small samples or less large samples?

Back (Answer)

more small samples

#8
Front (Question)

a homogenous area will require

Back (Answer)

less sampling than a heterogeneous one

#9
Front (Question)

highly clumped populations may require

Back (Answer)

more samples than random or uniform pop

#10
Front (Question)

performance curve

Back (Answer)

plots cumulative mean value of a trait against number of samples taken

#11
Front (Question)

how is cumulative mean calcualted

Back (Answer)

summing the total number of objects encountered and dividing it by total asamples

#12
Front (Question)

Quadrat method uses

Back (Answer)

used for estimating absolute pop density -used for small sessile or relatively sedentary organisms

#13
Front (Question)

mark/ recapture uses

Back (Answer)

estimating absolute population density -used for large and or mobile organisms

#14
Front (Question)

quadrat process

Back (Answer)

square shaped sampling area of known/ defined size, count all individuals and extrapolate to entire area

#15
Front (Question)

Quadrat variables n alpha A N N(hat)

Back (Answer)

n= average number sampled in quadrats alpha= size of quadrat A= total area N=total pop size N hat=estimated total pop size

#16
Front (Question)

N(hat) when do you round

Back (Answer)

when there is a decimal, always round

#17
Front (Question)

Mark recapture process

Back (Answer)

capture sample of individuals, mark, release into pop allow to disperse recapture random sample, note # of marked and unmarked

#18
Front (Question)

Assumption of mark recapture

Back (Answer)

marks must not be lost or overlooked no change in ration of marked to unmarked animals as a result of birth, death, immigration or emigration -marked and unmarked similar in all aspects- trappability etc -probability for recapture equal for marked and unmarked

#19
Front (Question)

Mark recapture variables M m N n

Back (Answer)

M=total number marked in population m=number marked in sample N=total population size n=total number in the sample